The 16th anniversary of United Flight 93's crash into a Pennsylvania field during the 9/11 terrorist attacks will mark the beginning of the end of a $46 million effort to transform the rural Pennsylvania crash site into a national memorial park.

Ground was broken Sunday on the final element of the Flight 93 National Memorial — a 93-foot tall Tower of Voices.

The National Park Service has restored a family cemetery that just happens to lie within the Flight 93 National Memorial, which honors those killed on the hijacked airliner that crashed in western Pennsylvania during the Sept. 11, 2001 terrorist attacks.

The cemetery belongs to the Sorber family, who buried relatives there from 1856 to 1892.

The park service says it has straightened headstones, landscaped and cleaned up the small cemetery, and fenced it in. The park service will offer tours of the fixed up cemetery on Tuesday.

The mother of Flight 93 victim Deora Bodley walked through the new visitor center this week before the public was invited in and described it as a “very moving rendition of the story of what happened September 11th.”

Debby Borza’s daughter Deora was a college student on September 11, 2001. She was traveling back home to San Francisco from New Jersey where she had been visiting friends, when the plane was hijacked as part of the 9-11 terrorist attacks.

Somerset County is trying to find a way to connect the Flight 93 National Memorial with the Great Allegheny Passage as part of a 1,100-mile September 11 National Memorial Trail, which would link the World Trade Center and Pentagon with the Flight 93 crash site.

The Pennsylvania Court Reporters Association has agreed to help transcribe interviews of family, friends, first responders and investigators as part of an oral history project at the Flight 93 National Memorial.

More than 800 oral histories have been collected so far in an effort to cover every aspect of the Flight 93 story.

It's been twelve years since the terrorist attacks of 9/11. The events of that day still haunt many of the responders who worked at the World Trade Centers, the Pentagon and Shanksville, PA.

In July of 2011 the World Trade Center Health Program, run by the National Institute for Occupational Safety and Health under the CDC, began offering counseling for responders who are suffering from symptoms of Post Traumatic Stress Disorder. On May 1 of this year Flight 93 and Pentagon responders were offered this counseling.

The Flight 93 National Memorial in Shanksville, Pa. will honor the 40 crash victims of United Flight 93 on the 12th anniversary of the Sept. 11 terrorist attacks.

Events begin 3 p.m. Tuesday as crews break ground on a visitor center. The 6,800 square-foot facility will try to tell the full story of Flight 93 and the terrorist attacks of Sept. 11. The building is expected to be completed September 2015. The Flight 93 National Memorial Capital Campaign announced it raised $40 million dollars to complete the national memorial.

Most adults remember what they were doing and how they felt on September 11, 2001. But many children today weren't even born when Flight 93 crashed in Somerset County.

"Normally, we're telling the story to people who lived it," Flight 93 Memorial superintendent,Jeff Reinbold told the Pittsburgh Post Gazette. "What happens is the parents come to one of our rangers and say, 'You tell them.' It became apparent to us no one is talking to the youngest kids."